Video Experimental Relacionado
Updated: Jul 12, 2026

11:14
Fatty Acid 13C Isotopologue Profiling Provides Insight into Trophic Carbon Transfer and Lipid Metabolism of Invertebrate Consumers
Published on: April 17, 2018
Piaeodicton: las huellas de los xenophyophores infaunales?
Resumen
Los xenophyophores de aguas profundas, organismos unicelulares, crean intrincadas redes de tubos de sedimento que se asemejan al antiguo fósil Paleodictyon. Este descubrimiento sugiere que los xenophyophores pueden ser responsables de la construcción de estos complejos patrones fosilizados.
Área de la Ciencia:
- Biología Marina Biología Marina.
- Paleontología Paleontología.
- Ecología de las profundidades marinas.
Sus antecedentes:
- Los xenophyophores son grandes organismos unicelulares que habitan en las profundidades del mar.
- El fósil Paleodictyon muestra complejas redes poligonales.
- Se ha planteado la hipótesis de un vínculo directo entre los xenofióforos y el paleodictión, pero no se ha confirmado.
Objetivo del estudio:
- Investigar el papel potencial de los xenophyophores modernos en la creación de estructuras similares al fósil Paleodictyon.
- Para examinar la morfología de un xenophyophore de aguas profundas y su estructura de prueba.
Principales métodos:
- Recopilación de una muestra de núcleo de caja de la Fosa del Japón.
- Examen microscópico de una muestra de xenophyophore.
- Análisis del cuerpo plasmático del xenophyophore y la estructura del ensayo de sedimentos.
Principales resultados:
- Se identificó un xenophyophore justo debajo de la superficie del sedimento.
- El organismo posee un cuerpo de plasma en forma de hilo dentro de los tubos de sedimento anastomosantes.
- La geometría de red de la estructura de prueba se asemeja mucho al fósil Paleodictyon.
Conclusiones:
- Los xenophyophores modernos construyen tubos de sedimentos orgánicamente unidos.
- La estructura de prueba del xenophyophore observado proporciona una fuerte evidencia de que los xenophyophores son los creadores del Paleodictyon.
- El plano corporal del xenophyophore puede dictar la geometría regular observada en los fósiles de Paleodictyon.
Más Videos Relacionados
Videos de Conceptos Relacionados
Diversity of Protists III
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
The Fossil Record
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
Diversity of Protists I
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
Diversity of Protists II
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
Diversity of Archaea II
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...

